Characterization and applications of Ag nanoparticles in waveguides

Roldán, María Virginia; Frattini, A.; Sanctis, O. de; Troiani, Horacio Esteban; Pellegri, N.

doi:10.1016/j.apsusc.2007.07.059

Cited by 28 publications

(21 citation statements)

References 14 publications

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“…Exploration of the use of noble metal particles embedded in the matrix materials in the fields of sensors, optical waveguides, photonic devices, and surfaceenhanced spectroscopes or reported elsewhere [7][8][9]. Most noble metal clusters are characterized by a SPR band lying in the visible region.…”

Section: Introductionmentioning

confidence: 98%

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

et al. 2017

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Cu-C 60 nanocomposite thin films are synthesized by co-deposition restive heating method on glass, silicon, and TEM grid substrates. Rutherford backscattering spectroscopy (RBS) analysis is used for determining the composition of Cu and thickness of thin film which one found to be ∼13 at% and ∼28 nm, respectively. The deposited thin films are irradiated with 100 keV Ag ion at different fluences ranging from 1 × 10 14 to 3 × 10 16 ions/cm 2 . Being of low energy, Ag ions got implanted in SiO 2 substrate up to a depth of 30-40 nm that results in wide surface plasmon resonance (SPR) band in combination with SPR of Cu nanoparticles. UVvisible absorption spectroscopy demonstrates the SPR peak arises due to copper nanoparticles embedded in fullerene C 60 matrix on irradiation of nanocomposite thin film and its variation under implantation of Ag nanoparticles in SiO 2 substrate. Structural modifications due to ion irradiation are analyzed by Raman and transmission electron microscopy (TEM). Raman spectroscopy study reveals the transformation of fullerene C 60 into amorphous carbon (a-C) with increasing fluence. Variation in particle distribution is observed under TEM. The average particle sizes are found to be ∼4 ± 0.7 and ∼6 ± 0.4 nm for pristine and 100 keV Ag ion-irradiated thin films, respectively. Atomic force microscopy (AFM) confirms the increase in grain size with increase in roughness of nanocomposite thin films under the effect of implantation. Xray photoelectron spectroscopy (XPS) confirms the presence of Cu and C from their chemical bonding in Cu-C 60 nanocomposite thin films.

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Section: Introductionmentioning

confidence: 98%

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

et al. 2017

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“…Research on Ag nanoparticles is particularly important for their potential applications in catalysis, 4) waveguides, 5) and biotechnology as nanosensors in cells. 6) For those applications, numerous chemistry methods such as the use of chemical reductants, 7), 8) electrochemical methods, 9) and photochemical methods 10) have been developed to synthesize Ag nanoparticles with different size.…”

Section: )mentioning

confidence: 99%

Facile synthesis and size control of Ag nanoparticles by a photochemical reduction at room temperature

Park

Zhang

Choi

et al. 2010

J. Ceram. Soc. Japan

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Facile synthesis and size control of Ag nanoparticles by a photochemical reduction was demonstrated. UVvisible spectra and photographs of the synthesized solutions with and without sodium citrate at different UV exposure times showed that sodium citrate played a crucial role for the growth of Ag nanoparticles. According to UV exposure of the Ag colloidal solutions with 0.250 mM sodium citrate for 0, 7, 15, 30, and 60 min, the average particle sizes were 0, 2.45, 5.58, 7.03, and 11.08 nm, respectively. Ag nanoparticles exhibited great increase in sizes, from 5.71 to 36.43 nm after UV exposure for 60 min, as the sodium citrate concentration increased from 0.125 to 0.500 mM. The photochemical reduction is hypothesized to decompose of citrate ions and result from photoelectron transfer from the neutral Ag atoms to the Ag + ions to form Ag nanoparticles. These results suggest that the photochemical reduction method can provide Ag nanoparticles in the presence of sodium citrate at room temperature without using a reducing agent.

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“…This effect is frequently used for enhancement of fluorescence from different organic molecules in liquid media [3,5,6]. But effective plasmonic enhancement of fluorescence in solid films or waveguides was obtained mainly for near the infrared region [1,7].…”

Section: Introductionmentioning

confidence: 99%

Sensitizing of Sm3+ fluorescence by silver dopant in the TiO2 films

et al. 2011

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Abstract:Composite material based on a TiO 2 matrix doped with Sm 3+ ions and co-doped with silver was investigated. Samarium ions together with nano-and micro-aggregates of silver were incorporated into the titanium alkoxide during the sol-gel process. Samarium ions were excited either directly (λ exc = 488 nm) or through the TiO 2 host (λ exc = 355 nm). It was revealed that samarium fluorescence (λ exc = 488 nm) in gelled TiO 2 films is enhanced by up to 20 times in the vicinity of silver inclusions. Sensitizing and plasmonic mechanisms of enhancement in Sm 3+ fluorescence are discussed.

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Characterization and applications of Ag nanoparticles in waveguides

Cited by 28 publications

References 14 publications

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

Effect of Ag Ion Implantation on SPR of Cu-C60 Nanocomposite Thin Film

Facile synthesis and size control of Ag nanoparticles by a photochemical reduction at room temperature

Sensitizing of Sm3+ fluorescence by silver dopant in the TiO2 films

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